Pulley block



1,639,439 Allg- 16 1927- w. s. sHEDENHl-:LM

PULLEY BLOCK Filed May 17, 1926 A TT ORNEYS.

Patented Aug. 16, 1927..

l,ti39,439

PATENT OFFICE.

WILLIAM G. SHEDENHELM, OF TIFFIN, OHIO.

' romain BLOCK.

Application med xa'y 1?,

This invention relates to pulley blocks and more particularly to a pulley block adapted to be connected with an elevated support While lifting a heavy load through the medium of companion pulley blocks and a co-l operating rope or cable. One object of the invention is to provide a pulley block including a main frame and an auxiliary frame pivotally connected therewith so that it may be swung and turned relative to the main housing and the rope or cahle prevented from binding or slipping out of proper engagement with a pulley wheel in the auxiliary housing.

Another object of the invention is to so mount the auxiliary frame that it may have free swinging and turning movement relatire to the main housing without the main housing being moved out of proper engagement with its support or out of proper angular relation to a lower load engaging pulley block.

Another object of the invention is to provide a pulley block which will be very strong and durable and may be subjected to rough use without being damaged.

This invention is illustrated in the accompanying drawing, Wherein,

Figure 1 is a view showing the improved pulley block in side elevation,

lFigure Q is a View showing the pulley block in end elevation, and

Figure 3 is a transverse sectional view taken along the line 3-3 of Figure 1.l

The pulley block forming the subject matter of this invention constitutes the upper pulley block of a block and tackle and when in use, is suspended from an elevated support. It includes a main housing or frame indicated in general by the numeral 1 and an auxiliary frame or housing, indicated in general by the numeral 2. The main frame is formed of metal and is provided with a cross head 3 from which extend dependingr arms 4 and 5 which preferably taper towards their lower ends, as shown in Figure 1. The cross head 3 projects'beyond the depending arm 4 to provide a side arm G which terminates at its free end in a head 7 constituting a hearing.

The pulley wheels 8 and 9 which are ro tatably mounted in the main frame for en- `gage-ment by flights of the hoisting rope or 1926. Seriell No. 109,708.

cable with which the ulley block is to be employed are disposed etween plates 10, 11 and 12, and are rotatably mounted through the medium of a common axle'l which passes through the hubs of the pulley Wheels and through registering openings formed in the arms 4 and 5 and plates 10 and 12, as shown in Figure 3. Referring to this figure, it will he seen that the head 14 of the axle is countersunlc in the arm 4 and that the other end portion of the axle projects into a pocket 15 formed in the outer face of the arm 5 and carries a Washer 16 and cotter pin, or other suitable fastener 16'. Sleeves or bushings 17 are placed upon the axle within the hubs of the pulley wheels to prevent. undue wear upon the axle and pulley wheels, and since the axle is removably secured, it will he seen that the bushing may be readily renewed when necessary. At theiriupper ends the plates 10 and 11 are joined by a bridge 18 which fits against the under face of the cross head 3 and is formed with an opening registering with an opening forged through the cross head. A hook 19, by means of which the block is to be suspended from an elevated support, has its shank 2O passed through the registerin opening from the cross head and bridge and at its ,lower end is formed with a head 21 which engages the bridge and serves to assist in retaining the plates 10 and 11 in proper position.

Referring to Figure 2 it will be seen that the plates 10, 11 and 12 are suhstantially rectangular in shape and so disposedin the frame that portions of the platesextend from opposite sides thereof, and serve to completely shield the pulley wheels. Bolts pass through alined openings formed in the corner portions of the plates and carry spacing sleeves 2?. which are disposed hetween the plates and securely hold the plates in proper spaced relation to each other with thc plates l() and 12 in close contacting engagement with the inner faces oll the depending arms 4 and The bolts which pass through the upper and lower corner portions of the plates are longer than those which pass through the .side corners and `pass through openings formed in the upper and lower end portions of the depending frame bars. The last-mentioned bolts will thereformed of mota' yirelztoo "to each wher and in Cll also notai the oo ts are spaced from the pafipheral ed@ a of the pulleys and wili ctiveiy fo drive more or cable int-3 and out of migagement Witt; the pulioys TheY auxiliar?! frame or housing also and includes side amis and 2 1 joined at. heir upper amis by a, @rags hea Qf A suspending Volto 27 is swivels-l to the cross: E@ by a o1 othoi suit able fastener and has its Mms extening' upwardly and terminting in bearing heafls 29 which fit :against opposite of the bearing heads 7 and receive pivot pin 3B passati tlough the boating *7. The pivot pin 3() is formed with lwzid at one and anti at, its other carris a Washer 31 and Cotter pins, or @they removnbie fastener 32. By having the frame swiveled to the support, or yoke 2l :mi this yoke pivotad to time outer end of the arm 5, it, will be possi bio to swing: the auXiia'-y immo towarfis and away from the main frame and also turn it about tfno axis o" the 'rivet Tlxorelore, the uml-- iary' fame may readily moved 'to at commoaie tsafi 'to tho anglo at which the portion.; of tim: mp@ of? Cble lo@ ig 'pullfi upon, is ex'fmed7 and the rope or cabi@ will bo prevonteai from having a temlenoy to move trainsve'aely out of engagement. with the pulley wheel and also prevent the' rope or cble from boing Worn fijiotomi Qngagement 'Withthe auxiliary Tho pulley wheel lits between 51de. plates which fit against the inner faces of the sitio arms 2i# and 25 :and is rotatably mounted through the medium of an axle 351 The axle 35 is similar to the axle 15 am", passes throagh the 'hub of the pulley Wheel and through registering openings formed in the side plates and arms of the frame. At one end it orme with a head counterstml: in the arm 24 ami its other end pol-tion projects into a recess formed in tho afm .35 and Cazrios a washer 36 and sotto? in o? other suitable fastener The sie plates of the auxiliary frame or homing re substantially triangular in Shape and have their' upper end portions ,set-umd to the arms 21; und T bv rivets 28 and their tapered .lower @mi pi v tionsv dra-vu by a bolt. 39 which 'riff-tile lower emi pmt of the 0 A l Carries, a ng sleeve to BI'IHS 3mi Y Y the lower ends of the. plating m properspace contact rivets he side arms.

ith

poper smeet?! mint/ion io each will twreroro, se seen zlat tti plates ll and wheel of the companion block. 'lhs rope 1s thm trained tim pulley wheel 8 and engaged with a sosoii pulley Wheel of the companion block and cari'ie "Wmdiy and engaged with tho pulley wheef of the auxiliary housing or mme. The @spending hook if? may now be mgagof with an elevated suppoit ond the com .anion pnlley secured to the lood, to be lift@ anni the 'free and 'oortons @if tim rope or cable drawn upon to etiec'a lifting of the loaf. Since the auxim); 'frame or housing i5 pvotally ami turn- .ahly connected witi the am; 6 it will be apparent that. the persoi or persons pulling upon ne hoisting rope may stand almost directly beneath the appt' puey block or at somo distance themfzom in pzwtically any duwt-ion desired ami whim sti'ain israpplied to the lwigtirlg my@ the auxiliary casing will swing away from tim main imma or tum about the litt aocommodate itself through the angl@ whicx the ic-isting fono extends downwa'fiy from the am: 6. e hoisting roya wil i'ioiefm'a? be prevented from boing mggeti transversely out of popef: engagement with the pulley wheel 33 and also ne provented from scraping against the of the auxiliary frame :md becoming Worn by riotion.

It wilt also be pmctioally impossible for the ope to slip trmsversely of the pulley and become jammed between. the pulley and, one or tim Side plates of tho auxiliary frame, and it will bo a great leal easier for the Wokmen to mw upon the rope and lift @i heavy load.

Having thus fisoribe the invention, I claim:

l. A pulleyY block comprising a. main frame, im auiliaiy frame disposed at one sitio of said main immo, a hanger having its lowe'r @ad tswivaeloc to said auxiliary frame and its tippe? and pivotaliy connected with said main from@ im* Swingin f toward and away tile pnl @ys rotatably orti-Ni said,

A pulley furl.

WAM:

nested au 2. Hilary i'r ti to and tiepen- *fzom said @ppc-rt, and pulleys rotataby mounted in said f'rame.

2. pulley block oomprsing a main frame, an am: onto diag; transversely from salti immo, s. emdiilg support pivoted to said arm to swing towards and away from said frame, an auxiliary frame swiveled to ,said support and depending theljelrom, and pulleys rotatably mounted insaid frames.

4. A. pulley block comprising a main frame, an arm extendin said frame,` an auxiliary t-ransversel from ame pivota y conmain frame and swing towards and awa nected with4 said arm and ade ted to tuxn about an axis extending longitu nally 0f the lo from one side' of said main frame, and pu leys rotatably mounted in said frames.

ln testimony whereof I atx my signature WILLIAM C. SHEDENHELM. {La} 

